<h4>Tool</h4><table border="0"><tr><td valign="top"><b>Name</b></td><td valign="top">Multi-Band Variation</td></tr><tr><td valign="top"><b>ID</b></td><td valign="top">9</td></tr><tr><td valign="top"><b>Author</b></td><td valign="top">O.Conrad (c) 2010</td></tr><tr><td valign="top"><b>Specification</b></td><td valign="top">grid</td></tr></table><hr><h4>Description</h4>Calculates for each cell the spectral variation based on feature space distances to the centroid for all cells in specified neighbourhood. The average distance has been used for Spectral Variation Hypothesis (SVH).

References:
- Palmer, M.W., Earls, P., Hoagland, B.W., White, P.S., Wohlgemuth, T. (2002): Quantitative tools for perfecting species lists. Environmetrics 13, 121?37.
<hr><h4>Parameters</h4><table border="1" width="100%" valign="top" cellpadding="5" rules="all"><tr><th>Name</th><th>Type</th><th>Identifier</th><th>Description</th><th>Constraints</th></tr>
<tr><th colspan="5">Input</th></tr><tr><td>Grids </td><td>Grid list (input)</td><td>BANDS</td><td></td><td></td></tr><tr><th colspan="5">Output</th></tr><tr><td>Mean Distance</td><td>Grid (output)</td><td>MEAN</td><td></td><td></td></tr><tr><td>Standard Deviation</td><td>Grid (output)</td><td>STDDEV</td><td></td><td></td></tr><tr><td>Distance</td><td>Grid (output)</td><td>DIFF</td><td></td><td></td></tr><tr><th colspan="5">Options</th></tr><tr><td>Radius [Cells]</td><td>Integer</td><td>RADIUS</td><td></td><td>Minimum: 1
Default: 1</td></tr><tr><td>Weighting Function</td><td>Choice</td><td>DW_WEIGHTING</td><td></td><td>Available Choices:
[0] no distance weighting
[1] inverse distance to a power
[2] exponential
[3] gaussian weighting
Default: 0</td></tr><tr><td>Inverse Distance Weighting Power</td><td>Floating point</td><td>DW_IDW_POWER</td><td></td><td>Minimum: 0.000000
Default: 1.000000</td></tr><tr><td>Inverse Distance Offset</td><td>Boolean</td><td>DW_IDW_OFFSET</td><td>Calculates weights for distance plus one, avoiding division by zero for zero distances</td><td>Default: 1</td></tr><tr><td>Gaussian and Exponential Weighting Bandwidth</td><td>Floating point</td><td>DW_BANDWIDTH</td><td></td><td>Minimum: 0.000000
Default: 1.000000</td></tr></table>